Generic API MCP Server

★ 14

from DaanTheoden

A generic server to interact with any REST API, allowing you to query data, create items, and call methods.

🔥🔥🔥✓ VerifiedFreeQuick setup

🚀 Aras Innovator Claude Agent

Connect Claude Desktop to Aras Innovator PLM via OAuth 2.0!

This Model Context Protocol (MCP) server enables Claude Desktop to interact with Aras Innovator using modern OAuth 2.0 authentication and OData REST APIs, allowing you to query PLM data, create items, and call methods directly from your AI assistant.

✨ What can you do?

🔐 Secure OAuth 2.0 authentication with Aras Innovator 14+
📊 Query PLM data using OData REST endpoints
✍️ Create new items (Parts, Documents, etc.) directly from Claude
🔧 Call Aras server methods and custom endpoints
📋 Access lists and configuration data
🛡️ Enterprise-grade security with bearer token authentication

🛠️ Available tools

Tool	Description	What You Can Ask	Example Endpoint
`test_api_connection`	Test OAuth 2.0 authentication	"Test my API connection"	N/A
`api_get_items`	Query Aras OData	"Get all Parts"	`Part`, `Document`
`api_create_item`	Create new Aras items	"Create a new Part"	`Part`, `Document`
`api_call_method`	Call Aras server methods	"Call method GetItemsInBOM"	Method names
`api_get_list`	Get Aras list values	"Show Part categories"	List IDs

🔐 OAuth 2.0 Authentication

This agent uses OAuth 2.0 Resource Owner Password Credentials Grant for secure authentication with Aras Innovator 14+. The authentication flow:

Token Request: https://your-server/oauthserver/connect/token
Scope: openid Innovator offline_access
Client ID: IOMApp (default Aras client)
Grant Type: password
Required: username, password, database

💬 Example conversations

You: "Test my API connection"
Claude: ✅ Successfully authenticated with API!
Bearer token obtained and ready for API calls.
Server URL: https://your-server.com/YourDatabase

You: "Get all Parts where item_number starts with 'P-'"
Claude: Retrieved 25 Parts matching your criteria...

You: "Create a new Document with name 'User Manual v2'"
Claude: Successfully created Document with ID A1B2C3D4...

🔧 Recent Fixes & Updates

✅ v1.1.0 - OAuth 2.0 & JSON Parsing Fixes

Fixed: "Unexpected token 'A', 'API MCP Se'... is not valid JSON" error
Added: Proper OAuth 2.0 authentication with requests-oauthlib
Added: Database parameter requirement for Aras authentication
Fixed: All print statements redirected to stderr to prevent stdout contamination
Updated: OData endpoint support (/Server/Odata)
Added: Proper HTTP headers for Aras REST API

🛠️ Troubleshooting

🔗 OAuth authentication failing?

Verify your Aras server supports OAuth 2.0 (Aras 14+)
Check credentials and database name in .env
Ensure user has API access permissions

🔐 "Missing database parameter" error?

Add ARAS_DATABASE=YourDatabaseName to your .env file

🤖 Claude not finding tools?

Restart Claude Desktop after config changes
Check file paths in claude_desktop_config.json

🐍 JSON parsing errors?

✅ Fixed in v1.1.0! Update to latest version

🏗️ Architecture

Claude Desktop
    ↓ JSON-RPC
MCP Server (stdio)
    ↓ OAuth 2.0
Aras Innovator
    ↓ OData REST API
PLM Database

🤝 Contributing

Found a bug or want to add features? We welcome contributions! Please check our issues or submit a pull request.

📚 Learn More

📄 License

MIT License - see LICENSE file for details.

Copy & paste — that's it

git clone https://github.com/DaanTheoden/aras-claude-agent.git
cd aras-claude-agent
pip install -r requirements.txt

📋 Prerequisites

🐍 Python 3.8+

Windows: Download from python.org
macOS/Linux: brew install python or sudo apt install python3 python3-pip

🤖 Claude Desktop (free!)

Download from claude.ai - no subscription required!

🏢 Aras Innovator 14+ with OAuth 2.0

Aras Innovator server with OAuth 2.0 endpoints enabled
Valid Aras user credentials with API permissions
Database access permissions

🎯 Quick start

1️⃣ Clone & install

git clone https://github.com/DaanTheoden/aras-claude-agent.git
cd aras-claude-agent
pip install -r requirements.txt

2️⃣ Configure your Aras connection

Create a .env file in the project root:

# Aras Innovator OAuth 2.0 Configuration
API_URL=https://your-aras-server.com/YourDatabase
API_USERNAME=your-aras-username
API_PASSWORD=your-aras-password
ARAS_DATABASE=YourDatabase

# Optional Configuration
API_TIMEOUT=30
API_RETRY_COUNT=3
API_RETRY_DELAY=1
LOG_LEVEL=INFO

💡 Copy from env_example.txt and update with your Aras credentials

3️⃣ Add to Claude Desktop

Edit your Claude Desktop config file:

📁 Windows: %APPDATA%\Claude\claude_desktop_config.json
📁 macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "api-server": {
      "command": "py",
      "args": ["C:/path/to/your/aras-claude-agent/main.py"]
    }
  }
}

💡 Replace the path with your actual installation directory!

4️⃣ Test your setup!

Verify installation:

python main.py

The server should start without any JSON parsing errors.

Test in Claude Desktop: Restart Claude Desktop and try:

"Test my API connection"
"Get all Parts from the database"
"Show me the available Document types"